GATE Ontology Tools

1
GATE Ontology Tools

• GATE Training Course
• October 2006
• Kalina Bontcheva
• kalina_at_dcs.shef.ac.uk

2
Ontology Plugins (gate 3.1)
3
OWLIM support (v. 4.0)

• Loading and viewing ontologies is the same from
  the GATE GUI
• Storage and reasoning performed by OWLIM
• Access is via a web service

4
Create New Ontology LR

• Example uses Jena as a backend
• Loads an ontology over the Web, in this case
  Proton (http//proton.semanticweb.org/)
• Supports OWL (Lite, DL, Full) RDF as this is
  what Jena supports

5
Loading extra data
http//www.dcs.shef.ac.uk/kalina/test/test-input.
rdf
6
View classes
7
View instances
8
Forthcoming ontology editor features

• Deleting classes, properties and instances
• Adding classes, properties and instances
• Modifying above
• We need these features so that we can correct the
  results of ontology learning and ontology
  population algorithms from within GATE

9
Ontology API

• FeatureMap features Factory.newFeatureMap()
• features.put("ontologyURL", ontologyURL)
• JenaOntologyImpl ontology (JenaOntologyImpl)
  Factory.createResource("gate.creole.ontology.jena.
  JenaOntologyImpl",features)
• Interface gate.creole.ontology.Ontology
• add/get/delete concepts/instances/properties

10
Ontology API (2)

• // adding a new class Person class name and
  comment
• OClass person ontology.createClass("Person","All
  humans")
• // adding a new class Man
• OClass man ontology.createClass("Man", "Male
  Person")
• // adding a new class Liquid
• OClass liquid ontology.createClass("Liquid","any
  thing that is in liquid form")
• // John is a person
• OInstance john ontology.addInstance("John",
  person)
• // water is liquid
• OInstance water ontology.addInstance("Water",
  liquid)
• // Man is a subclassof Person
• person.addSubClass(man)
• // Man drinks liquid
• ontology.addObjectProperty("drinks","man drinks
  liquid", man, liquid)
• // john drinks liquid
• john.addPropertyValue("drinks", water)

11
Onto gazetteer
12
Onto Gazetteer (2)
13
JAPE and Ontologies
14
Results
Results of sample rule without ontology as a
parameter
Results of sample rule with ontology as a
parameter
15
Sample use

• Knowledge Management and business intelligent
• gate.ac.uk/projects/sekt/
• Media analysis
• gate.ac.uk/projects/media-campaign/
• Multi-media semantic annotation
• gate.ac.uk/projects/prestospace/
• Software Engineering
• gate.ac.uk/projects/tao/
• Also used in an increasing number of commercial
  products, esp. for business intelligence